Atomic and Nuclear Physics quiz for Singapore O-Level Physics (SEAB 6091) quiz

Protons and neutrons

Protons and electrons

Neutrons and electrons

Only electrons

Beta

Alpha

Gamma

X-rays

Alpha

Gamma

Beta

None of them

The time for the source to decay completely

The time for half the radioactive nuclei to decay

Half the age of the source

The time for the activity to double

$160\ \text{Bq}$

$240\ \text{Bq}$

$120\ \text{Bq}$

$60\ \text{Bq}$

Because it is impossible to predict which nucleus decays next or exactly when

Because it can be stopped at will

Because the half-life keeps changing

Because only large atoms decay

A fast-moving electron

A helium nucleus (two protons and two neutrons)

A high-energy electromagnetic wave

A single proton

$\dfrac{1}{4}$

$\dfrac{1}{8}$

$\dfrac{1}{16}$

$\dfrac{1}{2}$

Generating sound

Cooling food

Producing magnetic fields

Sterilising medical equipment

It can damage or kill living cells and cause mutations

It makes objects magnetic

It lowers the temperature of the body

It has no effect on living tissue

Hold it in your bare hands

Use shielding and keep exposure time short

Keep it close to your body

Store it in an open dish

Ions

Molecules

Isotopes

Compounds